Mitering-machine



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J. T. ORISWELL. MITERING MACHINE.

No. 511,935. Patented Jan. 2, 1894.

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J. T. CRISWELL. MITERING MACHINE.

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UNITED TATES arnnr @rrrce.

JOEL T. CRISXVELL, OF COLLAMER, ASSIGNOR OF ONE-HALF TO ABRAM D. I-IARLAN, OF OOATESVILLE, PENNSYLVANIA.

MITERING= SPECIFICATION forming part of Letters Patent No. 511,935, dated January 2, 1894.

Application filed December 20, 1892. Renewed December 1, 1893. Serial No. 492,544:- (No model.)

To all whom it may concern.

Be it known that I, JOEL T. CRISWELL, a citizen of the United States, residing at 001- lamer, in the county of Chester and State of Pennsylvania, have invented certain new and useful Improvements in Mitering-Machines; and I do hereby declare the following to be a full, clear, and exact description of theinvention,such as will enable others skilled in the art to which it appertaius to make and use the same.

This invention relates to improvements in niitering machines and it consists in the novel construction and combination of parts, hereinafter described.

In the drawings Figure 1, represents an end view of my device. Fig. 2, is a front view, part sectional. Fig. 3 is a top View, part sectional. Fig. 4 is a vertical sectional View of one of the clamping bars. Figs. 5, 6, 7 and 8 are detail views.

Referring by letter to the accompanying drawings A designates the mitering machine consisting of the base a which is hinged at a to a cross strip 1), to the upper surface of whichis hinged as at nntwo standards 0, c, which are connected at their upper ends by a cross lever cl, that is pivoted to the standard c and the opposite end has a hooke which engages a bolt f in the standard 0' whereby the two standards are coupled to one another and are held parallel vertically. These standards are slotted vertically as at g and are de-v signed to receive the saw and guide bars. The base a is provided with a curved slot K the are being struck from the point or pivot Z, which connects an adjustable plate on thereto and having a pointer 01 and a bolt 0 in the slot. The base has legs g on which it rests. Upper Wings 0' are hinged to the top of the movable plate m and have curved arms t secured to it, passing through loops to on afixed arm 11 secured to the movable plate and a thumb screw w, designed to hold the wing r in a fixed position when set for mitering. These wings are each provided with arms so having holes y at their upper ends designed to receive one end of a chain a; the opposite end of said chain passing through a slot g in an adjustable clamp bar B, hereinafter more fully described and serves to bind the material to be out between said latter bar and the wings. The arrangement shown and described allows the hinged base to be adjusted to different positions in cutting miters and allows of adjustment to any desired angle and are also provided with gage-marks whereby the parts can be set and held in proper relation to one another. It Will-be seen that the machine herein shown can be adjusted to almost any angle, for cutting wagon seats, window frames and straight edges as well, all of which construction is substantially shown in my patent numbered 363,119 hereinbefore mentioned.

The standards 0, c, are provided with vertical grooves a a in which is placed a sliding bar Z), constructed in the form of the letter H; the cross piece W, of which has its play in the longitudinal slot 11 in the saw 0 This slot is open at the outer end of the saw and the two parts 62, (1 are held together by a clamping plate 6', having a thumb screw 6 by which said plate is firmly but removably secured to the end of the saw.

0, represents a depending bar, the upper end of which is secured to the cross bar d, which connect the upper ends of the vertical standards. The lower end of this depending bar has a hook f, which is designed to engage the saw through its slot and hold said saw up out of the way of the operator when the latter is preparing the material to be out, after which the hook is released and the saw allowed to descend for operation.

B represents the movable clamping bars one of which is arranged on either side of the standards. The same is slotted at g, at its upper end, having a face plate g secured to it. \Vithin this slot is arranged a bar h, that is pivoted at or near its center within the slot and said bar is provided with an upper forked end h, adapted to engage one of the links in the chain.

D, represents a thumb screw, on the lower portion of the face plate, the screw end of which is adapted to bear against the lower end 7 of the forked bar in tightening the clamping chains.

At the lower end of the movable clamp bar 13, is an adjusting plate '6', which is pivoted at its upper end as at 3', to the clamp bar;

the lower or free end thereof is provided with a point or hook 0, and above the same athumbscrews, is arranged. The end 5', thereof bears against said bar when adjusting said plate. This point or hook 0', enters one of the perforations w, in the plate to, secured to the upper face of the plate m on either side of the vertical standards. It will thus be seen that when the material is placed between the clamping bars and the wings r, the operator adjusts the free end of the chain to the forked end of the pivoted bar after which the thumb screw D, is turned causing the lower end of said bar to move inward and upon its pivot, thus causing the forked end to move outwardly tightening the chain and at same time drawing the clamping bar firmly against the material between the latter and wing, and by means of the thumb screw 8, on the pivoted plate, the clamping bar can be adjusted to a nicety.

An angular plate is secured to each wing, between which and the wing the clamping bar can be placed when not in use, and the improved device herein described is durable, easily operated and at the same time cheap to manufacture.

Having thus described my invention, what I claim is In a mitering machine the combination with the base, saw, its guides and the supporting base, of the adjustable clamping bar having I adapted to receive the point of the clamping bar substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

JOEL T. ORISVVELL.

Witnesses:

CYRUS LINGERFIELD, A. B. CRIswELL. 

